Chemical engineering is the branch of engineering that deals with physical science and life sciences ( biology, microbiology and biochemistry) with mathematics & economics, to the process of converting raw materials or chemicals into more useful or valuable forms. In addition, modern chemical engineers are also concerned with pioneering valuable new materials and related techniques - which are often essential to related fields such as nanotechnology, fuel cells and biomedical engineering. Chemical engineers use chemistry and engineering to turn raw materials into usable products, such as medicine, petrochemicals and plastics. They are also involved in waste management and research. Both applied and research facets make extensive use of computers. A chemical engineer may be involved in industry or university research where he or she is tasked in designing and performing experiments to create new and better ways of production, controlling pollution, conserving resources and making these processes safer.chemist may be involved in designing and constructing plants as a project engineer. This book explains the chemical engineering with the help of 7 different units.